cover to Naugatuck, Connecticut with "Waterbury Con Feb 21 1868" double circle datestamp and small portion of Six-Point Star, Type 2 (Rohloff S-5A) at right, small "Held for Postage" in oval handstamp, 3c Rose (65) added and tied by February 28 datestamp with Double Heart, light wear, fine, an extremely rare cover showing two different Waterbury fancy cancels